名称:
The double helical binuclear cooper complex of 6,6⁗ dimethyl-4′, 4‴ diphenyl-quinquepyridine and monohelical cadmium complex of 6,6⁗-dimethylquinquepyridine. Syntheses, crystal and molecular structure of [Cu2 (L2)2] [ClO4]3 · 2CH3CN and [CdL1] [ClO4]2
摘要:
The binuclear copper complex of 6,6''''-dimethyl-4',4'''-diphenylquinquepyridine L(2) and the mononuclear cadmium complex of 6,6''''-dimethyl-quinquepyridine L(1) have been prepared by the reaction of L(2) with Cu(ClO4)(2) . 6H(2)O and L(1) with Cd(ClO4)(2) . 2H(2)O, respectively. These complexes were characterized by elemental analysis, IR, H-1 NMR and fast atom bombardment MS spectra. X-ray crystallographic measurement reveals that a Cu-I Cu-II mixed valence state copper complex is obtained, in which two ligand molecules self-organized around the Cu-I and Cu-II ions to form a double helical configuration. The cadmium complex is mononuclear, has a highly symmetrical configuration and may be regarded as a monohelical compound. (C) 1997 Elsevier Science Ltd.